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<br />Traffic Control Devices <br /> <br />One-Way Streets <br /> <br />Purpose <br />Conversion of two-way streets to one-way <br />operation for purposes of residential street <br />traffic control take three forms: <br />CASE #1 - Divergent and convergent one-way <br />residential streets to reduce direct through <br />routes impacting the neighborhood. <br />CASE #2 - Alternating one-way streets throughout a <br />portion of a grid system to gain safety <br />advantages of one-way operations. <br />CASE #3 - Creating a one-way couplet by paring a <br />residential street with a nearby thru street to <br />create a corridor for thru traffic <br /> <br />ONE <br />WAY <br />.-4- <br /> <br />tONE WAVI <br /> <br />Fi6"1 <br /> <br />Fi6-2 <br /> <br />Source: FHWA Manual on Uniform Traffic Control Devices <br /> <br />Effects <br />Volumes Case #1 - reduces traffic volumes where thru traffic is a problem <br /> Case #2 - no significant effect on traffic volumes <br /> Case #3 - increases volumes on one street and reduces volumes on adjacent <br /> streets <br />Speed May increase speeds due to improved motorist comfort levels. <br />Traffic Noise and Air Minimal effect except in Case #1 which creates longer, circuitous routes for local <br /> traffic. <br />Traffic Safety One-way streets result in fewer potential conflicting movements, improving <br /> safety. <br />Advantages . Possible increased parking <br /> . Inexpensive to implement <br /> . May reduce traffic volumes <br /> . May increase roadway capacity <br />Disadvantages . May be considered inconvenient for residents <br /> . Possible increase in speeds <br /> . May increase volumes on other streets <br />Problems Targeted . High traffic volumes <br /> . High crashes due to conflicting movements <br />Design . One way streets can be used in combinations that force turns every few blocks <br /> to minimize speeding or cut-through problems <br /> <br />APRIL 2005 <br /> <br />15 <br />